Valve reseater



April 16, 1940. LACKEY 2,197,309

VALVE RESEATER Filed Sept. 7, 1938 I A II INVENTOK H hm/A Lacke Attorney Patented Apr. 16, 1940 UNITED STATES PATENT OFFICE VALVE RESEATER Application September 'z, 1938, Serial No. 228,845

2 Claims.

This invention relates to improvements in a valve reseater. Its primary object being to provide an inexpensive yet eflicient tool for the purpose of reseating valves which have become worn or pitted.

A further object of the invention is to provide a tool for the purpose set forth which will have a full bearing on the valve seat during operation.

A still further object of the invention is to provide a grinding tool to be used in conjunction with a grinding compound for the purpose set forth.

With these and other objects in view that may appear while the description proceeds the invention consists in the novel construction and arrangement of parts as hereinafter more specifically set forth, claimed and shown in the accompanying drawing forming part of this application and in which:

Fig. 1 is a general view of my invention show ing the tool in grinding position in a valve.

Fig. 2 is a plan view of the grinding disc.

Fig. 3 is a cross-sectional view of the disc on the line 33 of Fig. 2.

Fig. 4 is a cross-sectional view of the disc showing the bit shank in position.

Fig. 5 is a similar view at right angles to Fig. 4.

Fig. 6 is a modification of the device showing a square aperture and shank to fit the same.

Referring more in detail to the drawing in which similar reference characters designate corresponding parts throughout the several views it will be seen the invention comprises a disc Hi formed of abrasive material having oppositely disposed grinding faces H and 12. The center I3 is of greater thickness. than the grinding portion and is provided with a bevel it which keeps the disc central on the valve seat IS.

A central aperture 16 is formed concentrically with the disc l0 and keyways H and !8 formed on opposite sides of the disc and at right angles to each other.

The shank i9 is adapted to fit the central aperture l6 and is threaded on the lower end at 20 and a nut provided therefor. The upper end is formed to provide a bit shank 2| to fit a brace, or it may be constructed to fit an electric drill in which case the shank will be the same diameter throughout and adapted to fit a chuck. A key 22 extends through the shank at a predetermined distance from the end 20 having its ends projecting beyond opposite sides of the shank for engagement in the keyways I! and I8.

The modification shown in Fig. 6 discloses the disc constructed with a square aperture 23. The shank is also adapted to fit the square aperture, a square section 24 is formed on the said shank and a collar 25 against which the disc rests.

It will be seen in Fig. 1 that the disc is placed in contact with the valve seat with the shank at right angles thereto. The disc'is rotated back and forth in this position with the grinding compound on the valve seat. The disc may be made in a number of sizes to fit various sizes of valves and are interchangeable on the shank.

It is believed that the construction and advantages of the structure shown may be apparent from the foregoing paragraphs taken in conjunction with the accompanying drawing without further detailed description.

While the preferred embodiment of the inventio'n has been disclosed it is understood that minor changes in the details of construction, combination and arrangement of cooperating elements may be resorted to within the scope of what is claimed without departing from the spirit of the invention.

I claim:

1. In a valve grinding device as described, comprising an abrasive disc having reversible grinding faces, the central portion of said disc being of greater thickness to provide annular protrusions on both sides of the disc having plane faces, the peripheral edges of said protrusions being bevelled for maintaining the disc concentrically on the valve seat, and a rotating shank having one end detachably secured in an aperture through the center of said disc.

2. In a valve grinding device as described comprising an abrasive disc having reversible grinding faces, the central portion of said disc being of greater thickness to provide annular protrusions on both sides of the disc having plane faces, the peripheral edges. of said protrusions being bevelled for maintaining the disc concentrically on the valve seat, said disc having a central aperture extending therethrough, keyways in both faces of the disc arranged on op-. posite sides of the aperture, a shaft having one end extending through the aperture of said disc, and a key extending transversely through said shank above said disc, the ends of said-key projecting from opposite sides of said shank for engagement in said keyways to operatively secure saiddisc to said shank.

HYLAND A. LACKEY. 

